diff --git a/gunicorn/arbiter.py b/gunicorn/arbiter.py
index e3b12cb8b..e217a0175 100644
--- a/gunicorn/arbiter.py
+++ b/gunicorn/arbiter.py
@@ -454,7 +454,8 @@ def spawn_worker(self):
         except SystemExit:
             raise
         except:
-            self.log.exception("Exception in worker process:")
+            self.log.debug("Exception in worker process:\n%s",
+                    traceback.format_exc())
             if not worker.booted:
                 sys.exit(self.WORKER_BOOT_ERROR)
             sys.exit(-1)